破坏出现的主要位置应是钻头头部多喷嘴之间的区域、喷嘴本身及其周围区域和筋板及流道的逆压力梯度区。
Bit damage maybe occur on the area of bit wall around the nozzles, nozzles area and inverse pressure gradient area.
注射模的浇注系统是指从注塑机喷嘴开始到型腔为止的塑料流动通道，它是模具的一部分，一般分为普通流道浇注系统和无流道浇注系统两大类。
The runner system in the injection mold serves to convey the plastic melt coming from the nozzle of the injection molding machine to the cavity.
流道平衡稳定、热量分布均匀的流道板设计； 针对高温高耐磨工程塑料的开放式热流道喷嘴嘴尖；
Runner plate design with balanced and stable runner as well as even heat distribution: open hot runner nozzle tip for high temperature and high wear-resisting engineering plastics;
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